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168 THE TRIBE QNCIDERINI
Head minutely alutaceous, with a medlan line from occiput to clypeus; front
oblong, of vcry nearly equal width throughout, broadly concave between antenna!
tubercles, minutely alutaceous, with a number of rather coarse punctures on lower
half; genae only slightly higher thun wide, minutely alutaceous, almost entirely free
of punctures; eye with lower lobe ohlong-ovate, its height greater by more than one­
half that of geM; antenna! tubercles prominent, robust, widely separated, at apex
terminating in a short, acute horn, which is curved and directed forwards. Pra­
nctum strongly transverse, distinctly narrower at Ilpcx than at base; lD.teml tubercles
broad, feebly elevated, with a short, tooth-like process at apex; before middle each
side broadly tumid; apical trllnsverse sulcus distinct, broadly sinuous at middle,
basal one narrow, deep, multisinuose, lateral oblique onC:il broader; disk medially
with {\ broad, almost circulnr tubercle, each side of which, but more anteriorly, a
strong, rounded tumescence, traversed by a transverse, shallow impression, at middle
of base a few scattered punctures. Scutellum trnnsverSfl; ides almost straight,
obique; l apex broad, truncate, before margin a distinct, transvcrse, arcuate eleva­
tion extending from side to side. Elytra slightly expanded behind middle, then
strongly narrowed to apices, which are separately rounded, each tip being somewhat
angular; disk at bare with only a very feebly elevated gibbosity, c."'{treme base nar­
rowly smooth thence coarsely, irregularly, and fairly densely punctate to Ilpex, after
apical third punctures becoming finer; humeri slightly prominent, anterior margin
rounded, strongly obique, l angle with a large, rounded tubercle; sides behind humeri
somewhat rugose, below punctate as on disk except that punctures are clustered
into small patches. Prosternum simple, expanded posteriorly from before middle.
Procoxt!.e not tumid behind, anteriorly with a strong, conical tubercle, which is
obtuse at apex; femora lighUy clavate, profemora robust, basal half transversely
rugose on both margiru; of lower face and on posterior margin of upper fnce; tllrsal
claw segment !IS long as other three combined. Fifth stemite only slightly larger
than fourth, apex broadly truncate, not impressed. Antennae elongate, sixth seg­
ment attaining apex of elytra; fimbriate beneath on proximal six segments, on last
two of these sparsely so; scnpe robust, clavate on apical half, basally beneath ex­
ternally with two f!trong rugosities; third segment twice length of first, broadly bi­
sinuous; fourth and fifth successively shorter, following equal to llltter; last two
segments wanting.
LENGTH 15.5 mm.; width 6 mm.
Type locality.-Ega.
Distribution.-Amazon region of Brazil.
BRAZIL : Mille; &i.o Paulo de OlivenlOa, Brazil, Junc-July, 1883; (M. d'Mathnn);
[A. N. S. P.].
Hesychotypa turbida Bates
PLATE VI, FIGURE 13.
Tybalmia turbida Bates, BioI. Centr.-Amer., Col. v, 1880, p. 122.
Iscltiocentra 17UIculosa Bates, idem, pI. VIII, fig. 20.
"Distinguished from Tybalmia (1schiocentTa) maculosa Bates, from the Ama­
zons, by the lateral prominence of the thorax not forming n distinct eOnlenl tubercle;
in colors and markings there is a remarkable similarity between the two species.